Newbie- Sourcing/building servo power supplies in UK

[serriadh]

So, I've just grabbed a few servo motors from ebay which certainly appeared to be pretty good value for their size. They draw 60V, 10A continuous stall current, but (rather alarmingly) 50A 'maximum pulse current'.

Lots of people seem to be using Keling 1125oz-in motors which are of comparable spec on 1kw-1.5kw power supplies, so i'm assuming I don't really need to track down some 3k supplies.

Finding suitable power supplies in the UK is tricky, and what I'd really like to do is to find some suitable components and tranformers and nail something together myself, but all I've managed to find so far is this 10A part from Marchant Dice, and this 15A part from Quasar Electronics. Are either of these adequate for my needs? If not, could someone point me at a better source of components?

My Google-Fu seems particularly weak in this area, so I've not turned up a whole lot of useful stuff regarding DIY power supplies. If someone could fill me in here, that would be great. Just as an aside, I am well aware of the difficulties and hazards involved with building mains-voltage devices.

My second question regards servo power stages. I'd very much like to use a servo amp rather than a smarter servo drive, ie something like the Pico Systems PWM servo amp rather than a Gecko 320X, and PID control will be done using EMC2 and some suitable hardware. Both those devices provide 20A and will trip into a fault condition if the draw from the PSU exceeds this.

Is it pretty much essential that I find a power powerful amp, or will a 20A device work fine so long as I'm not overtaxing the motor? If I do definitely need a more powerful amp, does anyone have any suggestions? I've found one candidate part, but it isn't as convenient as the discrete pico systems device and its cost is approaching that of a Granite Devices VSD-E, a considerably more versatile part that would offer me far better bang-for-buck in many ways (though I'd rather spend a fair bit less... under £100/E120/$200 if possible).

Any advice gratefully appreciated!